Safety closure for wall openings



April 22, 1930.

W, F. .CANAVAN SAFETY CLOSURE FOR WALL OPENINGS Filed Sept. 1, 1927 3 Sheets-Sheet l April 22, 1930. w. F. CANAVAN SAFETY CLOSURE FOR WALL OPENINGS 3 Sheets-Sheet 2 Filed Sept, 1, 1927 fLzI I J IIIIWII IIl ill||lllJ Z z Z E 1 a 1r 02 1:. L. B T 4 I, a I \m 2 M 7 a 2 A. 7 2 f l .0 7 a O w a April 22, 1930. w. F..CANAVAN 1,755,868

I I SAFETY CLOSURE FOR WALL OPENINGS 7 Filed Sept. 1, 1927 s Sheets-Sheet s Patented Apr. 22,1930 1 JWILLI AM Tamm e cANAvAN, or M NTREAL, QUEBEC, ime; 1 L

' Application filed September Y 10 explanation in detail of an acceptable" .form' ofithe'inventiori. 7 g a I it The objects of the invention are to facilitate the opening and maintaining thewindow in .ianfropen' positionifollowing undue 7 pressure 5' from the inside, such as dust explosions in elevators-and othersunforeseen occurrences by the'abnormal increase of atmospheric volume resulting inthe forciblethrowl-ng. open of the 5 window; to insure"eflicient working' of the V, '20 partsithrough the eifectii'ze leverage employed i the gripping ofthe windowsash ;to elimi- 'nate' the difficulties 1 incident 5 to holding ithe window sash in an extreme'openpositiom to furnishthis mechanism at- 'a reasonable eoist' :25 t the consum'er'sgandinsurethe continuity of thesa'fety features to I add improved {con V ,kev 37 in said shafti27.- 1

' 'structional features tdthedeVice patented n U ite S te under N 3 3 2, January 1st, 1924; and generally: to provide a 30 a reliable, durable and'serv'iceable' device readily operated in groups or singly and applicable under many and-sundry conditions. In the drawings, Figure l'is a perspective view, showing the mechanism apart from the window.

Figure 2 is a side elevational View of a window sash showing the application of the mechanism. l

' Figure 3 is an inside elevational view of a 1 plurality of sashes operated by the media-- IllSII'l; v

Figure 4 is a cross sectional detail showing the clamping feature in securingthe lever mechanism to the ratchetwheel.

Figure 5 is a longitudinalsectional view of the levers, showing thedisengagement of the pawl from the ratchet in the extreme open erably' fixed between the bracket and, the

position of the window.

Figure 6 IS a perspective view showing the mechanism forindividual wall openings.

, and intermediate oftlie height of the Isas h v SAFETY CLOSURE. Fore WALL ornmnes 1, 1927. Serial No, 216,992.

Like numerals of reference indicate correspondingparts in the various figures. A Referring to the drawings,thetripod arms 10, l1 and 12 project outwardly from thawindow sash l3 and arersecured at their ,ends 14 end at'the-end :16 to the lower sash bar approximately in the centre. The'arms 10; and" 1l are angle'bars and the arm '12,-is.'se cured itherebetween at the. angles .17 and: the said arms extendoutwardly from the windowsin the-parallel extensions 18 and; 19; T e Pi l b rs 20 an 21 re p vqtally secured to the endsof the parallel extensions it The lever 25 is pivotally secured to the end i 24 of the connecting rod20and is rigid with clamp section 26 mounted onthe shaft 2'Z,-t he other clamp section 28being also mounted on the shaft 27 and drawn. to the section 26 by 0 the bolts 29 and nuts 3 0'pressin'g'onthe spring r washers 3113c theldesi-r'ed frictionpressure on the iratchet wheel 32, and particularly on the; circular-bosses 33-and 34 in-the recesses 35 and-36 in the said sections 26 and 28 respec-V tively, said ratchet wheel-being driven on the The section 26 is formed with a bracket extension 38, and an inwardly extending flange; 39 from the extreme upper-end of thebracket' under which the head 40 0f the pawl 41 is held to engagement with the ratchet wheel 32, said pawl being mounted on thepivot42 securedin said bracket extension. The tail; 43 r of the pawl 41 extendsrearwardly under the '8 strap 23 andfis depressed bysa-id strap when l the sash is fairly wideopen therebyfreleasing the pawl from its jengag'ement with the ratchet wheel, therebystoppi g thewindow from-further opening, r, is V I I 3 The handle 48 for indi iduaLoperati n may also be attached andused; when-desired, but in large-installations thelshaffi 27.. extends for a considerable distance arid is ournallfidi in the bearings 49 and operateflihy the worm;

-and'gear me'c1hanisme50 andhand whefil 5.1-

For. singlev operation the Y f 7. .is,= pref:

' iig res seiassseuer they are clamped to said ratchets, firmly enough to hold the sashes in the open positions. T v

. Inso far as the engagement of the ratchets through the spring-held pawls is concerned, these pswis' donotfleave the ratchets atall, the-sashes may be blown open and the result of this is that the pawls drag frointooth to aoetirevem1a ratchets until the open position is reached, and in that p'osfition'the V ratchet holds the sash outwardly and up aai-a1y;

lni'etui'nillg tlie sash to it's closed position,

jthe operated and the ratchet pushes against the continually until the sash reaches its closed position, 'confsequentlythere flisgiidiele'ase of the pawl at all from the ratchet;- This' is: shown and described in my "claimed therein; I

In the present invent-ion there is no in- "tntioii' to claim teams the ratchet and pawl mechanism for permitting the sashes "to swinger) their open positions automatically following an-"eX-pl'csion, but rather to Y claim-the frictional whereby each sash 1 may be oi-aerated"individually and lieldt'o its positirin hy means ofthe-frictioiial contact of the lever with the ratchet, and as well the j means employed fdreagaging the winaow sash and supporting,ithyjthe lever link and The eenneeeioa f them-sh supl) C )i'tllilg"fi,l llls, tli pivotal rod and then-1e tioiially held lever must be'emphasized in the 7 present invention, asthe means employed for perfeeting tli invention described and shown mhgtcergPamfie l fe-1,419,452 granted to me I were first of January 1924;

What 1;; (Elana is Q 1: In cperating mechanism for wall open.

rag ie'lssh'resga elosufe frame, a bracket utiri a "in easily lifting and wearing said and: having a plurality er arms spread Y to grasp said frame at the bottom and interdately; gases-eating lejv'r are connect I irr g-roa'p'ivotally secured to said bracket, a

f "r ftiliet suitably re-tented and trietionally {1' lever;

hani'sm for wall open frame, as operatin earlier Patent No. 1,l79,452, and broadly p at pis 'o any seciired is saidlever and a frame, asuppofting' at teepness a. as w a m-g see-plates adapted to engage and brake said ratchet and a lever extension from said housing pivotally connected to said bracket and a spring-held pawl secured to said housing'and engaging said ratchet.

3. In operating mechanism for wall opening 'ClOSLlIES,,fl window sash, a bracket having three supporting legs, one leg being secured to ahorizontal sash bar, and the other leg to upright bars, aleverlinkedto said bracket car- 7 rying a spring-held pawl and extending to formv afshaft bearing, an operating shaft joiirnalled in said'bearing, a ratchet fixedly mounted o n saidshaft adjacent to said extens on, and a plate secured to said extension so and bearing on said ratchet.

I 411m operating mechanism for wall opening closures, a window sash, a bracket having a spread ofleg's secured to said sash respectivelyat the bottom and intermediately and 35 converging to a pivot bearing, ailever carry- 'ing a spring held pawl and forming a ratchet enclosure, a link pivotally joining said arms andsaid lever and having an offset forming a stop, and an operatin gshaft and a ratchet {)0 in constant engagement with said pawl, said lever holding said ratchet in constant frictional contacte -V I i 5. In operating mechanism for wall open-V ing closures,v a window sash adapted'to be bodily .liftedito a horizontal position, a bracket having spreading arm's secured to said v sash, an operating'shaft and a ratchet fixedly mounted thereon, a' lever havinga removable plate adjustably secured thereto in contact 1 withsaidratchet at a predetermined pressure, a pawl carried'by said, lever and spring-held .to said ratchet,,a connecting rod in split sec- ,tions pivotally ]o1n 1ng said lever and said bracket and an u operatmg'handle secured 4 to said lever for individual operation.

"Signed at Montreal, Canada, this 25th day of August 1927.

WILLIAM FREDERIC OANA'VAN. 

